On November 7, a painter agreed with a homeowner to paint his house for $10,000, payment to be made upon completion of the job. On November 14, while the job was still incomplete, the painter told her paint supplier that if he would give her the paint she needed, she would have the homeowner pay to him directly the $3,000 for paint that she owed him. The paint supplier agreed, and the painter sent the homeowner a letter setting forth this agreement. On December 1, the painter had completed the job, but the homeowner refused to pay the paint supplier any money